Stay-bolt structure for boilers



E. I. [JO-DO S. STAY BOLT STRUCTURE FOR BDILERS.

APPLICATION-'FILED OCT. 3. l92l. 1,428,536. Patentedsept. 12,1922.

HEETS'SHEET I.

SF 71a..-

E. I, nouns. STAY BOLT STRUCTURE FOR BOILERS.

APPLICATION FILED OCT. 3 192!- PatentedSept. 12, 1922.

2 SHEETS-SHEET 2.

lilll.

atented Sept 12, 1922.

UNITED STATES PATENTOFFICEQ ETHAN I. DODDS, or rrrrssunsrr,PENNSYLVANIA, ASSIGNOR TO FLANNERY rom:

COMPANY, or PITTSBURGH, PENNsYLv nIA.

STAY-BOLT STRUCTURE FOR BOILERS.

To all whom it may concern Be it known that I, ETHAN I. Donns, a citizenof the United States, and a; resident of Pittsburgh, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Stay-Bolt Structures for Boilers; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in staybolt structures forboilers,-one object of the invention being to provide simple andeflicient means to facilitate the application of the parts to a boilersheet in such manner that the closure devices of the structure shall beeffectually clinched to the boiler sheet.

With this and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinaftermore fully described and pointed out in the claims.

In the accompanying drawings, Figures 1 and 2 are sectional viewsshowing an embodiment of my invention, and Figures 3 to 20 are viewsofmodifications.

The outer sheet 'ofa boiler is represented at l and provided with a bolthole 2, the wall of which latter is made rounded to form a seat for therounded or partly-spherical head 3 of a staybolt 4, whereby the lattermay have a flexible connection with the boiler sheet. In the embodimentof the invention shown in Figures 1 and 2, the rounded head 3 of astaybolt is made with dia,

metrically opposite recesses 5' and the walls 6 at the inner ends ofsaid recesses are made inclined in opposite directions respectively.

A ring or sleeve 7 having external screw threads 8 is located over thebolt opening 2 in the boiler sheet and provided at diametri callyopposite points with fingers 9; These fingers are bendable so that whentheir inner ends are made to engage the inclinedwalls 6 of the recesses5 and the ring 7 is forced inwardly or downwardly, said fingers will bebent so that their inner or lower ends will be caused to projectlaterally from the.

I the inner face of the latter as indicated in Figure 2. An internallythreaded closure 10 engages the external threads 8 of the ring 7 andbetweenthis closure and the outer face of the boiler sheet, awasher 11is disposed.

If desired the outerface of the boiler sheet.

may be made-With an annular recess or depress on to receive said washer.

It 1s apparent that when. the parts shall have been assembled in themanner above de scribed, and the closure 10'is screwed down against thewasher on the boiler sheet, the

ring 7 will be caused to move slightly in an outward direction and thehooked inner ends of the fingers 9 caused to tightly or firmly engagethe inner side of the boiler sheet, and thus the, closure devices willbe securely clinched to the boiler sheet. It willbe understood that therecesses 5 in the bolt head are of such size relatively to theproportions of the fingers 9 that free movement ofthe bolt head on itsseatinthe boiler sheet will not be interfered with and therefore theflexible connection of the bolt with the boiler sheet will bemaintained.

In the embodiment of the invention shown in Figure 3, a clincher sleeve12 is provided and made With depending or inwardly projecting fingers 13having shoulders 14: at their inner ends to engage the inner face of theboiler sheet 1. In this construction the recesses 5 in thebolt head 8?may have their inner end walls but slightly inclined. The sleeve 12 isthreaded externally to receive the internal threads of the cap orclosure 10 and the edge portion of this capor closure rests against awasher 11 seated on the boiler sheet. I

In Figure 4-1- of the drawing, Ihave shown a ring 12 having an inwardlyvprojecting annular flange 12 forming shoulders 12 and 12 12 rests on awasher 12 on the'outer face of the boiler sheet and the fingers 13 passthrough the bolt opening and through recessesin the wall of the latter(as in Fig ure 3) and are provid'edattheir inner ends with shouldersllto engage the inner face of the boiler sheet. The ring 12, is threadedinternally to receive an externally threaded cap or closure 1O andbetween the inner edge of this cap and the shoulder 12 in the ring Inthis construction the shoulder It de to the 12 a Washer 12 may bedisposed. sired the ring 12 may be welded boiler sheet as indicated at15.

If desired the upper or outer end portion of the fingers 13 may be bentas indicated i and 8, the bolt head 3' is formed with diametricallyopposite recesses, such as indicated 18 and a one-piece cap or closure19 is employed. Fingers 20 project from the inner face of this cap orclosure near the edge portion of the latter,-said fingers firstprojecting inwardly and then downwardly through the bolt opening inthe'boiler sheet and provided at their inner ends with shoulders 21 toengage the inner face of said boiler sheet. In this construction'aportion of the wall of the bolt opening is made cylindrical as at 22 anda portion is made rounded as at 28 to form the seat for the bolthead andthe fingers 20 lie against the cylindrical wall of said bolt opening.

In the construction shown in Figures 9 to 13 inclusive, the bolt head24: and a portion of the bolt 25 is provided with recesses 26 having theshape indicated in Figures 10, 12 and 13. A. cap or closure 27 isprovided with an internally threaded portion 28 to receive an externallythreaded ring or head 29. This ring is formed with integral laterallyprojecting arms 30 and from the latter, integral fingers 31 project in adirection to pass through the bolt opening in the boiler sheet andthrough the recesses in the bolt head. If desired a washer may belocated between the cap or closure 27 and the outer face of the boilersheet, or, if desired, this cap or closure may be welded to the boilersheet. Instead of making the head of the staybolt as shown in Figure 13it may have the shape shown at 24? Figure 14, or instead of providingthe head of the staybolt with two oppositely disposed recesses, saidhead may have the Form shown at 24 Figure 1.5.

In the construction shown in'Figures l6 and 17, the bolt and its headhas substantially the same form as that shown in Figures 9, 10, 12 and13, but in Figures 16 and 1"? I have shown an externally threaded ring32 having an angular opening 33 and fingers 34: to extend through thebolt opening in the l. boiler sheet and provided with shoulders toengage the inner face of said boiler sheet. The ring or sleeve 32 isscrew threaded externally for the accommodation of threads within a capor cl sure 35 and between the latter and the outer face of the boilersheet a washer 36 may be disposed.

In the construction shown in Figures 18, 19 and 20, a cap or closure 37to be mounted on. the boiler sheet 1 is threaded internally to receive aring 38 and this ring is made with a slightly tapering inner wall 39 forthe accommodation of a bearing member 10 for the head 41 of a staybolt42. The threaded ring 38 is provided with a plurality oi: fingers d3provided near their free ends with recesses to receive a bead 45 at thelower or inner end of the bearing membertO.

Having fully described my invention what I claim as new and desire tosecure by Let ters-latent, is:

1. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a clincher member having a part passing through theboiler sheet adjacent to said bolt opening and engaging the innerportion of the boiler sheet, said clincher member provided with meansforming a closure over the bolt head.

2. In a staybolt structure, the combination with boiler sheet having abolt opening, and a headed staybolt, of a clincher member having a partprojecting through the boiler sheet adjacent to the bolt opening andengaging the inner portion of the'boiler sheet, and a closure memberhaving threaded connection with said clincher member and cooperabletherewith and wit-h the boiler sheet to firmly secure said clinchermember to the boiler sheet and effect a rigid connection of the closurewith the boiler sheet.

3. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a staybolt provided with a head having'a recess. aclosure, and a member connected with said closure and passing throughthe boiler sheet and the recess in the bolt head, said member having apart to engage the inner portion of the boiler sheet.

In a staybolt structure, the combination with a boiler sheet having abolt opening, of a staybolt provided with a head having recesses, aclosure member toseat on the boiler sheet, and clincher fingerscooperable with said closure member and projecting through the boilersheet and through the recesses of the bolt, said clincher fingersprovided at their tree ends with parts to engage the inner portion ofthe boiler sheet in proximity to the bolt opening in the latter.

5. In a staybolt structure. the combination with a boiler sheet having abolt opening with a rounded wall, of a staybolt having a rounded head toseat on the rounded wall of the opening in the boiler sheet, said headhaving recesses forming inclined inner walls. an externally threadedring provided with fingers to project through the bolt opening in theboiler sheet and through the recesses in the bolt head whereby theinclined inner In testimony whereof, I have signed this specification inthe presence of two subscrib- 10 mg Witnesses.

ETHAN I. DOD'DS.

Witnesses:

HOWARD O. CAPPEL, F. H. ALLISON:

